Preparation of Bi_xY_((2-X))O_3 and its Photocatalytic Degradation of Molasses Fermentation Wastewater under Visible-light Irradiation

摘要

A series of Bi_xY_((2-X))O_3 photocatalysts were successfully prepared by a solid-state reaction and were subsequently characterized by powder X-ray diffraction, UV-vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy (XPS). The UV-vis diffuse reflectance spectra revealed that the Bi_xY_((2-X))O_3 samples absorbed light in the visible-light range (400-800 nm). The XPS results indicated that active oxygen species were generated on the Bi_(1.8)Y_(0.2)O_3 surface, which displayed a higher photocatalytic activity. When using photocatalytic degradation molasses fermentation wastewater as a model reaction, the Bi_(1.8)Y_(0.2)O_3 showed higher photocatalytic activity in comparison to Bi_(0.2)Y_(1.8)O_3 under visible-light irradiation.